Ken Griffin Citadel Advisors
Ken Griffin founded Citadel, one of the world’s largest and most successful hedge funds. Starting his trading career from his Harvard dorm room at a young age, Griffin quickly developed a keen sense for markets and built Citadel into a global powerhouse with billions in assets under management. Known for his quantitative and technology-driven strategies, Griffin has also made headlines for significant philanthropic contributions, supporting causes in education, the arts, and public institutions. Over the years, he has earned recognition as one of the preeminent figures in modern finance.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares Core S&P 500 ETF
IVV
|
+$2.72B |
| 2 |
Meta Platforms (Facebook)
META
|
+$660M |
| 3 |
Micron Technology
MU
|
+$605M |
| 4 |
Mastercard
MA
|
+$497M |
| 5 |
Tesla
TSLA
|
+$495M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$1.33B |
| 2 |
Visa
V
|
+$1.26B |
| 3 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$1.23B |
| 4 |
Lam Research
LRCX
|
+$699M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$681M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 4.49% |
| 2 | Healthcare | 2.99% |
| 3 | Financials | 2.85% |
| 4 | Industrials | 2.56% |
| 5 | Consumer Discretionary | 2.23% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
626
Vulcan Materials
VMC
$36.2B
| $139M | 0.02% |
508,715
+305,896
| +151% | +$90M |
|
627
CALL
Blackrock
BLK
$181B
| $138M | 0.02% |
143,200
-28,900
| -17% | -$30.4M |
|
628
PUT
Intuitive Surgical
ISRG
$141B
| $137M | 0.02% |
297,500
-168,600
| -36% | -$85.3M |
|
629
PUT
T-Mobile US
TMUS
$194B
| $137M | 0.02% |
652,500
-104,700
| -14% | -$21.5M |
|
630
MongoDB
MDB
$36.6B
| $136M | 0.02% |
557,057
-304,660
| -35% | -$102M |
|
631
PUT
First Majestic Silver
AG
$9.2B
| $136M | 0.02% |
6,312,300
+3,193,200
| +102% | +$73.6M |
|
632
Pan American Silver
PAAS
$20.1B
| $136M | 0.02% |
2,481,922
+1,296,210
| +109% | +$74.7M |
|
633
Dianthus Therapeutics
DNTH
$6.18B
| $135M | 0.02% |
1,610,483
+541,549
| +51% | +$31.4M |
|
634
Southern Copper
SCCO
$162B
| $134M | 0.02% |
796,194
+495,183
| +165% | +$89.5M |
|
635
PUT
Carnival Corporation Ltd
CCL
$38.5B
| $134M | 0.02% |
5,178,100
-875,400
| -14% | -$25.5M |
|
636
PUT
Regeneron Pharmaceuticals
REGN
$83B
| $133M | 0.02% |
172,400
-101,600
| -37% | -$77.8M |
|
637
Cummins
CMI
$87.4B
| $132M | 0.02% |
245,656
-658,888
| -73% | -$373M |
|
638
California Resources
CRC
$4.7B
| $132M | 0.02% |
1,905,435
+698,720
| +58% | +$39.5M |
|
639
CALL
Workday
WDAY
$43.2B
| $132M | 0.02% |
1,014,900
+591,100
| +139% | +$93.8M |
|
640
Emcor
EME
$36.9B
| $132M | 0.02% |
178,496
-14,865
| -8% | -$10.8M |
|
641
BrightSpring Health Services
BTSG
$12B
| $132M | 0.02% |
3,087,924
+2,940,026
| +1,988% | +$118M |
|
|
FPS
642
Forgent Power Solutions
FPS
$9.8B
| $132M | 0.02% |
+4,494,181
| New | +$150M |
|
643
Five Below
FIVE
$13.4B
| $132M | 0.02% |
575,717
-512,705
| -47% | -$107M |
|
644
DexCom
DXCM
$34.4B
| $131M | 0.02% |
2,091,872
+2,004,972
| +2,307% | +$140M |
|
645
PUT
Coherent
COHR
$66.3B
| $131M | 0.02% |
550,700
+79,700
| +17% | +$18.3M |
|
646
MACOM Technology Solutions
MTSI
$24.3B
| $131M | 0.02% |
590,570
+457,447
| +344% | +$102M |
|
647
Armstrong World Industries
AWI
$7.72B
| $131M | 0.02% |
795,281
+249,192
| +46% | +$45.6M |
|
648
Amphenol
APH
$208B
| $131M | 0.02% |
1,036,810
+412,745
| +66% | +$58.1M |
|
649
On Holding
ONON
$10.2B
| $131M | 0.02% |
3,847,157
+768,706
| +25% | +$33.6M |
|
650
CALL
United Rentals
URI
$69.6B
| $131M | 0.02% |
179,500
+14,500
| +9% | +$12.2M |
|
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Ken Griffin's Q1 2026 Portfolio in Review
As of Q1 2026, Ken Griffin held 14,860 positions worth $618B, down 7.1% from $666B the previous quarter. Its ten largest holdings account for 22% of the portfolio.
Ken Griffin withdrew a net $19.5B in Q1 2026, closing 2,003 positions and reducing 5,286 holdings. Its most notable exit was CyberArk, an estimated $305M position sold in full.
By sector, the portfolio is most concentrated in Technology at 4.5% of assets, down from 4.9% a quarter earlier, followed by Healthcare and Financials.
Against the trend, Ken Griffin opened a new position in iShares 7-10 Year Treasury Bond ETF worth $327M.
- Ken Griffin's largest Q1 2026 buy was iShares 7-10 Year Treasury Bond ETF: 3,431,225 shares worth $327M.
- Ken Griffin added most to iShares Core S&P 500 ETF in Q1 2026, an estimated $2.72B increase.
- Ken Griffin's biggest Q1 2026 reduction was Amazon, cutting an estimated $1.33B.
- Ken Griffin fully exited CyberArk in Q1 2026, selling an estimated $305M.
- Ken Griffin's ten largest holdings make up 22% of its $618B portfolio in Q1 2026.
- Ken Griffin opened 2,347 new positions and closed 2,003 in Q1 2026.
- Ken Griffin's portfolio value fell 7.1% quarter-over-quarter to $618B.
Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.